Ava Etemadzadeh, who is now 27, said that she informed Labour officials at the time of the incident

But Labour immediately came under fire over why it had taken so long to act – given the leaders’ office was told about the events in January 2016. After the allegations were raised the MP for Luton North, 76, was later promoted to the Shadow Cabinet.

Ava Etemadzadeh, 27, said she had told Labour whips about the incidents and that a regional rep contacted Jeremy Corbyn’s team to raise concerns at the start of last year.

Speaking to the Telegraph last night she said: “I know the leaders’ office was informed and they didn’t act on it, which is absolutely disgraceful.

“He was then promoted to the Shadow Cabinet. An independent reporting body to deal with these cases would have been better.”

Sir Michael Fallon say's he has 'fallen short' of standards expected of the armed forces in wake of

The sacking will put Jeremy Corbyn under pressure to take action on sexual misconduct allegations

This week a young activist Bex Bailey stunned Westminster by revealing she had been raped by a senior Labour party member in 2011 – and was then told reporting it may hurt her career.

Yesterday the Sun revealed a senior Labour MP had been called by other sex abuse victims following Bex Bailey’s horrific account.

As Westminster reels, her former boss, Labour MP Liz Kendall, has urged Labour to leave “no stone unturned” in finding out why it Bex Bailey had been let down – but also to ensure the culture within the party was changed once and for all.

Ms Etemadzadeh met Mr Hopkins in 2013. After an event at Essex University a year later she alleges he rubbed his crotch against her when hugging “very tightly” to say goodbye.

After swapping texts, she accepted an invite to see the MP in Parliament in February 2015 only to be left feeling “uncomfortable” when asked about her personal life.

She claims that at one point he said that if his office had been empty he would have like to have taken her there.

Later in the month he telephoned her several times. He then sent a text saying she was a “lovely young woman – attractive, intelligent charming and sweet natured.

“A nice young man would be lucky to have you as a girlfriend and lover.

“I am sure one such is soon to be found. Were I to be young… but I am not.”

Rumours about Kelvin Hopkins have grown this week. Challenged by the Sun earlier this week whether he was under investigation Labour refused to comment.

In a statement last night Labour said:“On the basis of allegations received by the Labour Party today, Kelvin Hopkins has been suspended from party membership, and therefore the Labour whip, while an investigation takes place.

“The Labour Party takes all such complaints extremely seriously and has robust procedures in place to deal with them.”

A Labour source insisted they had only received a formal complaint from Ms Etemadzadeh for the first time yesterday. He added much more detail had come to light since the first contact in January 2016.

Meanwhile, Labour was slammed over a new sex abuse complaints procedure – after saying party officials will review all cases.